Hinged last



Dec. 2 1930. G.. c. THOMAS HINGED LAST Original File'd Oct. 2 1922 Patented Dec. 2 ,1930 r 1 UNITED STATES collapsed by pressure alone but which offers GEORGE o. THOMAS, or swAMPsoo'rT, mnssncnusnijllg.hfisl r lfi DOUBLE PIVOT LAST COMPANY, OF AUBUREQYIME A ooitronhr ononMAINE"; 1

HINGED inn-s r 1 Application filed Qct0 ber 25, 1922, Serial nasaasen; Renewed oetobenzsjxieso;

This invention relates to collapsible lasts, and is illustrated as embodied in an impositive lock last, that is, a last whichkcan'be to collapse'a definite and increasing resistance over a short distance from extended position. It has been'proposed to. provide the resilient structure required to permit the yielding resistance by means of a resilient hinge-or abutment-pin, which is deformed or bent by the stresses incident to collapse (or extension). Two practical solutions of the prob lem have beenprovided by H. W. Lucas and myself, which are described and claimed in our applications, Ser. No. 514,722, filed Nov.

12, 1921, and Ser. No. 516,194, filed Nov. 18, 1921, respectively. It is an object of this invention to improve still further theconstructions provided by the two prior inventions noted.

Accordingly, a principal feature of the invention resides in a novel organization comprising a resilient hinge or abutment pin located in the joint between the toe and heel parts of a collapsible last, and an inextensible arched link connecting the parts, the center of the arch extending over and clearing the resilient pin. I

This and other features of the invention comprising certain combinations and ar rangements of parts will be understood from the following description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying rated by a cut conveniently formed to permit I the use of an abutment pin or bearing'pin between the last parts. As shown, it consists of a V slot 14 in the top of the last and a short vertical cut 16 running from the bottom of the last to the apex of the V. Ahole 18 is bored transversely through the last along the Fig. 2 is a perspectiveview ofthe novel.

hell w t e er len g h iiea ens n e ee s 2 1 v Th estpe fie vare h l oget ye ink. Ztef. erehi e m, he jn m t i tees tend parts by two hinge pins 26, 2 8, respec tively. h epihee e Se sit a th th l e j i n their ,centers, orithe eflectivelength :of *the link, ,passes substantially below thev cen-Y ter of the pin 20 when .thelast is in extended on, position, and doesnot pass.belowthiscenter h n the es i c p d, i be ng bvi us; ha w ng up h h e p in eell ree ll: raise this line. The archlink 2/1 is-not resile t an s; 10 bend or e erm. i the ee 1 lapsing novement.v ,The hinge; pin 20; vdoes epseaun e he p essurelex rted 93 71 16 ar h i k a the l ne-join ng t ehd 'm v te- We d h eent lt efthe p n Te h -s Qt 22,

which ispreferably arranged atthe upper or m; -We .sid iei th pin, par al y ese u de he es te ind ca e n dot ed lines-in i 1-. The stifiness of the cylindrical pin in ree sisting this. compression supplies the resilient resistance tothe initial collapsing movement 7;.

which is desired, The pin can, ofcou-rse, be designed to work without being, slotted all that is necessary being that it he compress, ible, and offerg a substantial resistance to such pr ssi Th me hanis -il ustretedt so.

y p p tendetrehs ii 1;

The rem-0 1M105 d eteht 'eh of the P is measured .bythe separation of the two arcs 30, 32, the former being swung about the center 36 of thepin 20 and the latter about the center of the pin 26. The design is such that the angle of the cut 14 in the top of the last is not greater than the angle 3436'28. This will insure the parts remaining tight at all times. t It willbeobvious that the novel pin disclosed can be used in any of the positions shown in the disclosures of the applications above cited, and the terms hinge pin or abutment pin are to be read broadlyenough herein to cover the meaning of the same terms in these applications. V Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is o th pin, and fa eher in th t up i 1. A last comprising a forepart, a heel part, a single resilient abutment pin in the joint between the last parts and extending across the last and an inextensible link with its ends pivoted to the last parts and extending over the pin in an arch, the line joining the ends of the link lying below the center of the abutment pin, the said pin being deformable under pressure to efiect a resiliently resistant initial collapsing movement.

2. A last comprising a heel part and a forepart, a single resiliently compressible hearing pin forming part of the joint between the last parts and extending from one side of the J last to the other, and an inextensible hinge link arching over the pin and oining the last parts, the effective length of the link being less than the sum of the distances of its ends from the center of the'pin, and said effective length lying below the said center when the last is extended.

3. A last comprising a heel part and a fore part, having their opposed faces provided with recesses, a split resilient tube arranged in said recesses, and a bonding member rigid in the direction of its length and pivoted to the heel part and to the fore part, said bonding member being formed to extend about said split resilient tube.

4. A hinge last comprising a fore part and a heel part capable of movement between an extended and a collapsed position, a bonding member having fixed pivotal connection with both of said parts, rigid in the direction of its length and arranged to permit the last parts to move from an extended to a collapsed condition or vice versa, and a split resilient tube forming the pivot connection between the two last parts and extending across the plane of movement of said bonding member, the bonding member being formed to extend about the split resilient tube so as not to interfere with the movement of the last from extended to collapsed condition or vice versa.

In testimony whereof I have signed my name to this specification.

, GEORGE O. THOMAS. 

